The popular milkshake comes in vanilla, chocolate, strawberry and banana

Fans were keen to chip into the debate, with a number relieved to find that they weren’t the only person who indulges in the bizarre practice and many of them responding with details of their favourite flavour for dunking.

Sarah MacKinnon said: “I am so glad I have found others that do this. Chocolate everytime. Though If I'm not dunking, just drinking, then it's banana.”